﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class StringUtil
    {

         public static void heise (){ 
         Console.WriteLine("请输入数据");
            string sst = Console.ReadLine();
            if ( string.IsNullOrWhiteSpace(sst))
            {   
                Console.WriteLine(true);

            }
            else
            {
                Console.WriteLine(false);
                
            }


        
        }
       
        
    }
}
